syzkaller login: [ 68.975257] BUG: Bad rss-counter state mm:0000000037cc7f97 type:MM_FILEPAGES val:33 [ 68.976754] BUG: Bad rss-counter state mm:0000000037cc7f97 type:MM_ANONPAGES val:22 [ 69.080846] ================================================================== [ 69.081793] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.082733] Read of size 8 at addr ffff88800e3b7058 by task sshd/228 [ 69.083625] [ 69.083862] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 69.084728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.085881] Call Trace: [ 69.086264] <TASK> [ 69.086600] dump_stack_lvl+0x91/0xf0 [ 69.087177] print_report+0xcc/0x620 [ 69.087782] ? __virt_addr_valid+0x102/0x340 [ 69.088448] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.089180] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.089946] kasan_report+0xbe/0xf0 [ 69.090517] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.091255] vma_interval_tree_remove+0xc75/0xec0 [ 69.091980] vma_prepare+0xc54/0x11a0 [ 69.092587] __split_vma+0x5af/0x950 [ 69.093174] ? __pfx___split_vma+0x10/0x10 [ 69.093835] ? find_held_lock+0x2c/0x110 [ 69.094471] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.095159] ? lock_is_held_type+0x9f/0x120 [ 69.095825] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.096565] ? mtree_range_walk+0x632/0x900 [ 69.097242] ? mas_walk+0x5c7/0x7c0 [ 69.097833] do_vmi_munmap+0x1f1/0x2b0 [ 69.098435] mmap_region+0x1f9/0x2660 [ 69.099028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.099648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.100519] ? __pfx_lock_acquire+0x10/0x10 [ 69.101171] ? __pfx_mmap_region+0x10/0x10 [ 69.101842] ? security_mmap_addr+0x7d/0xa0 [ 69.102435] ? get_unmapped_area+0x1f5/0x3f0 [ 69.103001] do_mmap+0x854/0xf00 [ 69.103455] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.103965] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.104544] ksys_mmap_pgoff+0x3af/0x500 [ 69.105074] do_syscall_64+0x3f/0x90 [ 69.105581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.106254] RIP: 0033:0x7f802ceabd82 [ 69.106728] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 69.108940] RSP: 002b:00007ffc06483f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.109901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f802ceabd82 [ 69.110769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f802c2e5000 [ 69.111649] RBP: 00007f802c2e5000 R08: 0000000000000009 R09: 0000000000001000 [ 69.112549] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d3f237f60 [ 69.113433] R13: 00007ffc06483f20 R14: 00007ffc06483f50 R15: 00007ffc064842b0 [ 69.114349] </TASK> [ 69.114650] [ 69.114872] Allocated by task 220: [ 69.115315] kasan_save_stack+0x22/0x50 [ 69.115842] kasan_set_track+0x25/0x30 [ 69.116363] __kasan_slab_alloc+0x59/0x70 [ 69.116919] kmem_cache_alloc+0x16b/0x370 [ 69.117460] vm_area_dup+0x20/0x160 [ 69.117943] __split_vma+0x170/0x950 [ 69.118429] split_vma+0xc6/0x110 [ 69.118891] mprotect_fixup+0x8d2/0xb30 [ 69.119421] do_mprotect_pkey+0x87e/0xd40 [ 69.119962] __x64_sys_mprotect+0x78/0xc0 [ 69.120500] do_syscall_64+0x3f/0x90 [ 69.120994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.121694] [ 69.121915] Freed by task 220: [ 69.122324] kasan_save_stack+0x22/0x50 [ 69.122843] kasan_set_track+0x25/0x30 [ 69.123359] kasan_save_free_info+0x2b/0x50 [ 69.123918] __kasan_slab_free+0x10a/0x190 [ 69.124476] kmem_cache_free+0x10d/0x4d0 [ 69.125005] rcu_core+0x8c8/0x2860 [ 69.125472] __do_softirq+0x1b7/0x7d4 [ 69.125976] [ 69.126212] Last potentially related work creation: [ 69.126824] kasan_save_stack+0x22/0x50 [ 69.127341] __kasan_record_aux_stack+0x8e/0xa0 [ 69.127934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.128594] remove_vma+0x139/0x170 [ 69.129067] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.129629] do_vmi_munmap+0x1f1/0x2b0 [ 69.130113] __vm_munmap+0x138/0x3a0 [ 69.130582] __x64_sys_munmap+0x59/0x80 [ 69.131079] do_syscall_64+0x3f/0x90 [ 69.131560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.132207] [ 69.132420] Second to last potentially related work creation: [ 69.133098] kasan_save_stack+0x22/0x50 [ 69.133614] __kasan_record_aux_stack+0x8e/0xa0 [ 69.134187] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.134834] remove_vma+0x139/0x170 [ 69.135306] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.135867] do_vmi_munmap+0x1f1/0x2b0 [ 69.136363] mmap_region+0x1f9/0x2660 [ 69.136846] do_mmap+0x854/0xf00 [ 69.137282] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.137790] ksys_mmap_pgoff+0x3af/0x500 [ 69.138297] do_syscall_64+0x3f/0x90 [ 69.138781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.139440] [ 69.139658] The buggy address belongs to the object at ffff88800e3b7000 [ 69.139658] which belongs to the cache vm_area_struct of size 168 [ 69.141214] The buggy address is located 88 bytes inside of [ 69.141214] freed 168-byte region [ffff88800e3b7000, ffff88800e3b70a8) [ 69.142679] [ 69.142902] The buggy address belongs to the physical page: [ 69.143584] page:00000000ffada371 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3b7 [ 69.144673] memcg:ffff88800de01701 [ 69.145113] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.145790] page_type: 0xffffffff() [ 69.146238] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392cc0 dead000000000002 [ 69.147141] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de01701 [ 69.148036] page dumped because: kasan: bad access detected [ 69.148691] [ 69.148905] Memory state around the buggy address: [ 69.149477] ffff88800e3b6f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 69.150338] ffff88800e3b6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.151189] >ffff88800e3b7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.152106] ^ [ 69.152840] ffff88800e3b7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 69.153724] ffff88800e3b7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.154577] ================================================================== [ 69.155691] Disabling lock debugging due to kernel taint [ 71.112383] BUG: Bad rss-counter state mm:000000003a5867ac type:MM_FILEPAGES val:33 [ 71.113419] BUG: Bad rss-counter state mm:000000003a5867ac type:MM_ANONPAGES val:22 [ 71.564221] BUG: Bad rss-counter state mm:00000000f78e4b06 type:MM_FILEPAGES val:33 [ 71.565014] BUG: Bad rss-counter state mm:00000000f78e4b06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49490' (ECDSA) to the list of known hosts. 2023/06/20 16:00:54 fuzzer started 2023/06/20 16:00:54 dialing manager at localhost:36067 2023/06/20 16:00:54 checking machine... 2023/06/20 16:00:54 checking revisions... [ 72.280460] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:00:54 testing simple program... [ 72.330236] cgroup: Unknown subsys name 'net' [ 72.375058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:53 Registers: info registers vcpu 0 RAX=1ffff11001959e5f RBX=ffff88800cacf2c8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cacf2f8 RBP=ffff88800e59f980 RSP=ffff888008d9fc98 R8 =0000000000000001 R9 =ffffed10011b3f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800e5a0c80 R14=ffffffff8186b835 R15=ffff88800e340080 RIP=ffffffff818464e2 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffde4016000 CR3=000000001abb6000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e1c0000 RCX=0000000000000000 RDX=1ffff11002cef704 RSI=0000000000000008 RDI=ffff88801677b820 RBP=ffff88801677b800 RSP=ffff888018c2fbb0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000000 R13=00007f4a080bc000 R14=0000000000000000 R15=ffffffff81165140 RIP=ffffffff8182499d RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f4a080d7269 CR3=000000000e722000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=756e696c2d34365f3638782f62696c2f XMM01=2e6f732e6c736e62696c2f756e672d78 XMM02=00322e6f732e6c736e62696c2f756e67 XMM03=2d78756e696c2d34365f3638782f6269 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000